One of Fuller's clients, Gus Worland, followed the principles of this diet and shed more than 20kg.
"The interval weight loss programme teaches you how to decrease your set-point back to your healthy weight gradually, so you can stay at this weight effortlessly. The thing I probably liked the most about the programme was the fact that I was never hungry because I didn't need to limit my food intake if the food I was eating was nutrient-rich and energy-dilute, which basically means fruits, vegetable, grains and similar healthy foods," shared Worland.
The top five foods to avoid
COCONUT OIL: Cleverly marketed as a healthier choice, it actually contains a huge 120 calories per tablespoon and 12g of saturated fat. It's also harmful to cholesterol levels and blocks up arteries.
Fuller believes olive oil is the healthier choice as evidenced in the Mediterranean diets, which have proven successful for centuries.
Studies show that olive oil can even help lower your risk of heart disease.
WHITE BREAD: Contains little to no nutrition and is heavy on calories and sugar.
Fuller recommends swapping white bread for wholegrain, which contains far more fibre and nutrients. Wholegrains also help you lose weight or maintain your current natural weight.
CHEESE: Three slices, or 100g contains a massive 400 calories.
Put down the yellow artery blocker and choose skim milk options instead.
Greek yoghurt is also a great replacement for your favourite dairy treat.
ALCOHOL: Avoiding unnecessary calories found in alcohol is a great way to slim down according to Fuller.
He recommends no more than two standard drinks a day to those who are already frequent drinkers, or switching to water, which contains no calories at all.
DRIED FRUIT: Dried fruit contains five times the amount of calories as fresh fruit because all the water has been removed. This makes it far more energy dense than fresh produce.
Fuller recommends choosing fresh fruit instead and states that it is a crucial part of weight loss.